This one-of-a kind aircraft was an important in-flight simulator primarily used to study how an aircraft would handle before building an expensive, full-scale prototype. The TIFS first flew in 1970, and its first research project simulated the B-1 bomber’s flying characteristics. During its long and successful career, the TIFS simulated many military and NASA aircraft, including the X-40, Tacit Blue, Space Shuttle, B-2, YF-23 and C-17.